看开关的(de)位置要是(shi)在(zai)电(dian)(dian)表(biao)(biao)(biao)(biao)的(de)下(xia)方，九成的(de)可能性是(shi)电(dian)(dian)表(biao)(biao)(biao)(biao)所带(dai)负(fu)荷的(de)控制开关，如果是(shi)集(ji)装(zhuang)表(biao)(biao)(biao)(biao)箱(xiang)大部分(fen)在(zai)侧(ce)(ce)面有(you)个(ge)大闸，那是(shi)整个(ge)电(dian)(dian)表(biao)(biao)(biao)(biao)箱(xiang)的(de)电(dian)(dian)源(yuan)(yuan)控制开关，电(dian)(dian)表(biao)(biao)(biao)(biao)下(xia)方的(de)那个(ge)开关如果给他拉(la)下(xia)那电(dian)(dian)表(biao)(biao)(biao)(biao)还会(hui)有(you)电(dian)(dian)，但(dan)(dan)是(shi)电(dian)(dian)表(biao)(biao)(biao)(biao)所带(dai)的(de)负(fu)荷便会(hui)停(ting)电(dian)(dian)，要是(shi)集(ji)装(zhuang)表(biao)(biao)(biao)(biao)箱(xiang)侧(ce)(ce)面的(de)大闸拉(la)开那整个(ge)表(biao)(biao)(biao)(biao)箱(xiang)都会(hui)停(ting)电(dian)(dian)，但(dan)(dan)大闸电(dian)(dian)源(yuan)(yuan)侧(ce)(ce)带(dai)电(dian)(dian)。